#4271DB#4271DB

#4271DB is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.2% C 0.170 H 263.9°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#4271DB
RGB	rgb(66, 113, 219)
HSL	hsl(222, 68%, 56%)
HSV	hsv(222, 70%, 86%)
CMYK	cmyk(69.9%, 48.4%, 0%, 14.1%)
CIE-LAB	lab(49.59, 19.22, -59.02)
CIE-LCH	lch(49.59, 62.07, 288.04°)
OKLab	oklab(57.21% -0.0182 -0.1693)
OKLCH	oklch(57.21% 0.17 263.9)
XYZ	xyz(20.9336, 18.0808, 69.3908)
Luminance	0.1808 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271DB #DBAC42

analogous

#42BDDB #4271DB #5F42DB

triadic

#4271DB #DB4271 #71DB42

tetradic

#4271DB #DB42BD #DBAC42 #42DB5F

square

#4271DB #DB42BD #DBAC42 #42DB5F

split-complementary

#4271DB #DB5F42 #BDDB42

monochromatic

#1A3C89 #2453BC #4271DB #7598E5 #A9BEEF

Accessibility & contrast

On white

4.55

#4271DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#4271DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4271DB

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271DB	#FFFFFF	#000000	##000000
##4271DB	1.00	4.55	4.62	4.62
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#367DDF

Deuteranopia (green-blind)

#026FD9

Tritanopia (blue-blind)

#008A9B

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #4271db;
/* rgb */ color: rgb(66, 113, 219);
/* oklch */ color: oklch(57.2% 0.170 263.9);

Tailwind

colors: {
  custom: {
    50: '#8899e7',
    500: '#4271db',
    950: '#000000',
  },
}

SCSS

$custom: #4271db;
$custom-light: #8899e7;
$custom-dark: #000000;

JSON

{
  "hex": "#4271db",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 219
  },
  "hsl": {
    "h": 221.569,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.57209,
    "c": 0.17032,
    "h": 263.9
  },
  "luminance": 0.18083
}

Semantic roles & 50–950 ramp

primary

#4271DB

secondary

#DCC99D

accent

#B53DEB

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #4271DB

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →